Question

Evaluate:$\frac{5\sin {17}^o}{\cos {73}^o}+\frac{2\cos {33}^o}{\sin {57}^o}-\frac{7\sin {80}^o}{\cos {10}^o}$

Answer 1

$=\frac{5sin{17}^o}{cos{73}^o}+\frac{2cos{33}^o}{sin{57}^o}-\frac{7sin{80}^o}{cos{10}^o}$

$=5+2-7$

$=7-7$

$=0$